JP5879505B2 - Electric cooker - Google Patents

Description

  The present invention relates to an electric cooker that uses a commercial power source as a power source and heats cooked food.

  Conventionally, this type of electric cooker has detected the temperature of the cooked food and the like to control the energization of the cooking means (see, for example, Patent Document 1).

  FIG. 3 shows a conventional electric cooker (electric water heater) described in Patent Document 1. As shown in FIG. As shown in FIG. 3, the water 1, the container 2 that contains the water 1, the heating means 3 that heats the container 2, and the water temperature detection means 4 that detects the water temperature of the water 1 in the container 2. Yes.

Japanese Patent No. 3362282

  However, in such a conventional configuration, when the voltage of the commercial power supply rises abnormally due to a missing neutral line of the commercial power supply or incorrect wiring of the commercial wiring, the amount of heat generated by the heating means 3 increases abnormally. The water 1 contained in the container 2 has a problem that it erupts vigorously.

  Moreover, after the water 1 accommodated in the container 2 spouted out vigorously, the user had the problem of noticing an abnormality for the first time.

  These problems are not limited to electric water heaters, but are similar for electric cookers with heating means and rotating means.If the voltage of the commercial power supply rises abnormally, abnormal heating or abnormal rotation occurs, and then abnormal For the first time, the user has noticed that an abnormality has occurred due to an abnormal phenomenon or abnormal sound caused by heating or abnormal rotation.

  The present invention solves the above-mentioned conventional problems, and even if the voltage of the commercial power supply rises abnormally due to a missing neutral line of the commercial power supply or incorrect wiring of the commercial power supply, the cooking means abnormally overheats or rotates abnormally. An object of the present invention is to provide an electric cooker that can notify the user that the voltage of the commercial power supply has abnormally increased.

In order to solve the above conventional problems, the electric cooker of the present invention includes a cooking unit, and a current supply control means for controlling power supply to the cooking unit, a voltage sensing means for measuring the voltage of the commercial power source, the commercial setting the first threshold value setting means the voltage of the power supply sets the first threshold value higher than the detection voltage value of said voltage detection means in the case of normal, the second threshold set lower than the first threshold value a second threshold setting means for, comparing the sensed voltage value and the first comparison means for comparing the first threshold, the detection voltage value of said voltage detecting means and said second threshold said voltage detecting means and second comparison means, said first threshold value or more with the detection voltage value of said voltage detection means in the comparison in the first comparing means to permit energization of the cooking unit is lower than the first threshold value through to the cooking means in the case of a It prohibits the energization inhibiting means detecting a voltage value of said voltage detection means in the comparison in said second comparison means to permit energization of the cooking device when it becomes less than the second threshold value, counting means and adding means for adding 1 to said counting means each time the energization inhibiting means prohibits the energization, and a third threshold value setting means for setting a third threshold value, the count value and the third of said counting means a third comparison means for comparing the threshold, with a notification unit count value of said counting means in said third comparison means for notifying the arrival to the third threshold value, the first threshold value, the The energization prohibiting means is set in series with the cooking means, and is set to be equal to or lower than the detection voltage value of the voltage detecting means when the voltage of the commercial power supply rises abnormally due to a missing or miswired commercial power neutral line. Connected relay contact And when the detection voltage value of the voltage detection means is lower than the first threshold value, the relay contact is closed and energization to the cooking means is permitted, and the detection voltage value of the voltage detection means is the first voltage value. When the threshold value is exceeded, the relay contact is opened to prohibit energization of the cooking means, and once the detection voltage value of the voltage detection means is greater than the first threshold value and the relay contact is opened, the voltage to the detection voltage of the detection means is equal to or less than the second threshold value is one that is configured to remain open the relay contacts.

As a result, the detection voltage of the voltage detection means is reduced to the first due to a missing or miswired neutral line of the commercial power supply.
When the threshold value of the cooking means is exceeded, the relay contact connected in series to the cooking means is opened to prohibit the energization of the cooking means, abnormal heating and abnormal rotation of the cooking means can be prevented, and the counting means is Counting the number of times power is prohibited by the power supply, and when the value is equal to or greater than the third threshold, the notification means can notify the user that the voltage of the commercial power supply has abnormally increased. It is.

The electric cooker of the present invention includes a cooking unit, and a current supply control means for controlling power supply to the cooking unit, a voltage sensing means for measuring the voltage of the commercial power supply, when the voltage of the commercial power source is normal a first threshold value setting means, and second threshold value setting means for setting a second threshold value which is set lower than the first threshold value for setting the first threshold value higher than the detection voltage value of said voltage detecting means a first comparison means for comparing the sensed voltage value and the first threshold of the voltage sensing means, second comparison means for comparing the sensed voltage value and the second threshold of said voltage sensing means, said the cooking unit when it becomes equal to or greater than the first threshold with the detection voltage value of said voltage detection means in the comparison in the first comparing means to permit energization of the cooking unit is lower than the first threshold value It prohibits energization of the said second comparison hand Energizing inhibiting means detecting a voltage value of said voltage detecting means to allow the energization of the cooking device when it becomes less than the second threshold value in the comparison, the energization of the energization inhibiting means is to the cooking means prohibits the a counting means for counting a by and accumulated time, and a third comparing means for comparing the third threshold value setting means for setting a third threshold value, count time value of the clock means and said third threshold value, comprising a notification means for notifying that the measured time value of the clock means has reached said third threshold value in said third comparing means, said first threshold value, deficient or incorrect neutral line of the commercial power source The voltage detection means when the voltage of the commercial power supply rises abnormally due to wiring is set below the detection voltage value of the voltage detection means, the energization prohibition means has a relay contact connected in series to the cooking means, Of voltage detection means When the intelligent voltage value is lower than the first threshold value, the relay contact is closed to allow energization to the cooking means, and when the detected voltage value of the voltage detection means becomes equal to or higher than the first threshold value, the relay contact point And the energization of the cooking means is prohibited, and once the detection voltage value of the voltage detection means is equal to or higher than the first threshold value and the relay contact is opened, the detection voltage value of the voltage detection means is those that are configured to remain open the relay contact until less than the second threshold value.

As a result, when the detection voltage of the voltage detection means becomes greater than or equal to the first threshold due to a missing or miswired neutral line of the commercial power supply, the relay contact connected in series with the cooking means is opened to energize the cooking means. Prohibiting and preventing abnormal overheating and abnormal rotation of the cooking means, and the time measuring means time-measures the cumulative time value of prohibiting energization according to the above, and notifies when the value exceeds the third threshold value. By this means, the user can be notified that the voltage of the commercial power supply has risen abnormally.

The electric cooker of the present invention prohibits energization to the cooking means by opening a relay contact connected in series to the cooking means when the voltage of the commercial power supply exceeds a threshold due to missing neutral wires or incorrect wiring. Thus, abnormal overheating and abnormal rotation of the cooking means can be prevented, and the user can be informed that the voltage of the commercial power source has risen abnormally.

The system block diagram which made a part block diagram of the electric cooker in Embodiment 1 of this invention The system block diagram which made a block diagram the part of the electric cooker in Embodiment 2 of this invention Sectional view of a conventional electric cooker (electric water heater)

A first aspect of the present invention is a cooking means and said energizing control means for controlling the energization of the cooking unit, a voltage sensing means for measuring the voltage of the commercial power supply, the voltage when the voltage of the commercial power source is normal sensing means of the first threshold value setting means for setting a high first threshold value than the sensed voltage value, the second threshold value setting means for setting a second threshold value which is set the lower than the first threshold, the voltage detection first comparing means for comparing the sensed voltage value and the first threshold means, and second comparison means for comparing the sensed voltage value and the second threshold of said voltage sensing means, said first comparison the power supply to the cooking unit when it becomes equal to or greater than the first threshold with the detection voltage value of said voltage detection means in the comparison in unit permits the power supply to the cooking unit is lower than the first threshold value prohibited, and the ratio in the second comparing means The voltage energizing inhibiting means detecting a voltage value of the detection means to allow the energization of the cooking device when it becomes less than the second threshold value, counting means, each time the energization inhibiting means prohibits the energization in adding means for adding 1 to said count means, and third comparing means for comparing the third threshold value setting means for setting a third threshold value, the count value and the third threshold value of the counting means, wherein comprising a notification unit count value of the counting means in the third comparison means for notifying the arrival to the third threshold value, the first threshold value, the missing or faulty wiring neutral line of the commercial power source The voltage of the commercial power supply is set to be equal to or lower than a detection voltage value of the voltage detection means when the voltage rises abnormally, and the energization prohibition means has a relay contact connected in series to the cooking means, and the voltage detection Meaning detection voltage value is before When the voltage is lower than the first threshold, the relay contact is closed to allow energization to the cooking means, and when the detected voltage value of the voltage detection means is equal to or higher than the first threshold, the relay contact is opened to cook the cooking. When energization to the means is prohibited, and once the detection voltage value of the voltage detection means is equal to or higher than the first threshold value and the relay contact is opened, the detection voltage value of the voltage detection means is equal to or lower than the second threshold value. and until those configured to remain open the relay contacts.

Thereby, the first threshold value is set to be equal to or lower than the detection voltage value of the voltage detection means when the voltage of the commercial power supply rises abnormally due to missing or miswiring of the neutral line of the commercial power supply. The relay has a relay contact connected in series with the cooking means, and in the comparison in the first comparison means, the detection voltage of the voltage detection means becomes equal to or higher than the first threshold value due to the missing or miswiring of the neutral line of the commercial power supply. The energization prohibiting means opens the relay contact to inhibit energization of the cooking means, and the second threshold value in which the detection voltage of the voltage detection means is set to be equal to or lower than the first threshold value in the comparison in the second comparison means. The energization prohibiting means closes the relay contact and allows the cooking means to be energized in the following cases, thereby preventing abnormal overheating and abnormal rotation of the cooking means due to abnormally increased commercial power supply voltage. This It is, even when the voltage value of the commercial power supply is continued to fine variation in the first vicinity of the threshold, does not prohibit the release thereof frequent energization of the cooking means by relay contact (chattering) is performed. In addition, the counting means counts the number of times power is prohibited, and when the value reaches the third threshold value, the notifying means notifies the user that the voltage of the commercial power supply has abnormally increased. If the commercial power supply voltage exceeds the threshold due to missing neutral wires or miswiring, the cooking means can be prevented from being energized, thereby preventing abnormal overheating and abnormal rotation of the cooking means. At the same time, the user can be notified that the voltage of the commercial power supply has risen abnormally.

A second invention is a cooking means and said energizing control means for controlling the energization of the cooking unit, a voltage sensing means for measuring the voltage of the commercial power supply, the voltage when the voltage of the commercial power source is normal sensing means of the first threshold value setting means for setting a high first threshold value than the sensed voltage value, the second threshold value setting means for setting a second threshold value which is set the lower than the first threshold, the voltage detection first comparing means for comparing the sensed voltage value and the first threshold means, and second comparison means for comparing the sensed voltage value and the second threshold of said voltage sensing means, said first comparison the power supply to the cooking unit when it becomes equal to or greater than the first threshold with the detection voltage value of said voltage detection means in the comparison in unit permits the power supply to the cooking unit is lower than the first threshold value prohibited, and the ratio in the second comparing means The voltage energizing inhibiting means detecting a voltage value of the detection means to allow the energization of the cooking device when it becomes less than the second threshold value, the energization inhibiting means is prohibited energization of the cooking unit in a counting means for counting the accumulated time that are, a third comparison means for comparing the third threshold value setting means for setting a third threshold value, count time value of the clock means and said third threshold value, said first in 3 of the comparison means comprises a notifying means for counting the time value of the clock means is notifying the arrival to the third threshold value, the first threshold value, the missing or faulty wiring neutral line of the commercial power source The voltage of the commercial power supply is set to be equal to or lower than a detection voltage value of the voltage detection means when the voltage rises abnormally, and the energization prohibition means has a relay contact connected in series to the cooking means, and the voltage detection The detection voltage value of the means is The relay contact is closed when lower than the first threshold value to allow energization to the cooking means, and when the detected voltage value of the voltage detection means is greater than or equal to the first threshold value, the relay contact is opened and the relay contact is opened. The energization of the cooking means is prohibited, and once the detected voltage value of the voltage detecting means becomes equal to or higher than the first threshold value and the relay contact is opened, the detected voltage value of the voltage detecting means becomes the second threshold value. those that are configured to remain open the relay contact until less.

Thereby, the first threshold value is set to be equal to or lower than the detection voltage value of the voltage detection means when the voltage of the commercial power supply rises abnormally due to missing or miswiring of the neutral line of the commercial power supply. The relay has a relay contact connected in series with the cooking means, and in the comparison in the first comparison means, the detection voltage of the voltage detection means becomes equal to or higher than the first threshold value due to the missing or miswiring of the neutral line of the commercial power supply. The energization prohibiting means opens the relay contact to inhibit energization of the cooking means, and the second threshold value in which the detection voltage of the voltage detection means is set to be equal to or lower than the first threshold value in the comparison in the second comparison means. If the power supply prohibition means closes the relay contact and permits the power supply to the cooking means in the following cases, the commercial power supply voltage has risen abnormally due to missing or miswiring of the neutral line of the commercial power supply. Cooking hands It is possible to prevent abnormal overheating or abnormal rotation, even when the detection voltage value of the voltage sensing means of the commercial power supply was continued fine variation in the first threshold value near Li
There is no prohibition and cancellation (chattering) of frequent energization of the cooking means by the lathe contact . In addition, when the time counting means measures the cumulative time of prohibition of energization and the value reaches the third threshold value, the notification means informs the user that the voltage of the commercial power supply has abnormally increased. If the voltage of the commercial power supply exceeds the threshold due to missing neutral wires or miswiring, the cooking means can be prevented from being energized to prevent abnormal overheating and abnormal rotation of the cooking means. In addition, the user can be informed that the voltage of the commercial power source has risen abnormally.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a system configuration diagram illustrating a block diagram of a part of the electric cooking device according to Embodiment 1 of the present invention.

In FIG. 1, a cooking means (here, a heater) 10 energizes the first relay coil 112 according to the temperature of the food and the user's operation. The energization is controlled by the energization control means 11 constituted by the first relay coil energization control means 113 to be controlled.

  The first diode 121 rectifies the commercial power supply 13, and the capacitor 122 smoothes the current rectified by the first diode 121.

  The power supply circuit 12 generates a DC voltage that serves as a power supply for each part of the circuit from the current smoothed by the capacitor 122.

  The series connection of the first resistor 141 and the second resistor 142 connected in parallel to the capacitor 122 constitutes the voltage detection means 14, and the divided voltage value of the first comparison means (here, a comparator) 15 Connected to the input of the negative input terminal.

  The series connection of the third resistor 161 and the fourth resistor 162 connected between the outputs of the power supply circuit 12 constitutes the first threshold value setting means 16, and the divided voltage value is set as the first threshold value. One comparison means 15 is connected to the input of another plus input terminal.

  The energization prohibiting means 17 includes a fifth resistor 171, a sixth resistor 172, a transistor 173 driven by the output of the first comparing means 15 via these, and an energization controlled by the transistor 173. 2 relay coil 174 and a second relay contact 175 that is driven by this relay coil 174 and connected to control the current supply to the cooking means 10.

  The series connection of the second diode 181 and the seventh resistor 182 is connected in the direction of conducting the current from the connection point of the third resistor 161 and the fourth resistor 162 toward the output of the first comparison means 15. Then, the output of the first comparison means 15 is fed back to the input terminal (plus input terminal) to which the first threshold value is input, and the output of the first comparison means 15 is given a hysteresis characteristic.

  The second threshold value setting means 18 is a series connection of the second diode 181 and the seventh resistor 182, and the input of the first comparison means 15 to which the first threshold value is input (plus input terminal). And the voltage level of the input (plus input terminal) of the first comparison means 15 is changed.

  The second comparison means 19 is realized by sharing the first comparison means 15 in hardware by realizing the second threshold value setting means 18 by feedback of the input / output of the first comparison means 15. doing.

  The adding means 21 changes the output of the first comparison means 15 from H to L when the detection voltage of the voltage detection means 14 exceeds the first threshold voltage determined by the first threshold setting means 16. Each time, 1 is added to the count value of the counting means 22.

  The third comparison unit 24 compares the third threshold determined by the third threshold setting unit 23 with the count value of the counting unit 22. When the count value reaches the third threshold value, the notification unit 25 notifies the user. The notification means 25 may be anything as long as it draws the user's attention, such as an LED or a buzzer.

  About the electric cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, the current supplied from the commercial power supply 13 is supplied to the cooking means 10 via the energization control means 11, and at the same time, rectified by the first diode 121, smoothed by the capacitor 122, and supplied to the power supply circuit 12. Is done.

  At this time, the voltage waveform of the first capacitor 122 is a half-wave rectified waveform. In this half-wave rectified waveform, the peak value is substantially the same as the peak value of the voltage waveform of the commercial power supply 13.

  This half-wave rectified waveform is divided by the first resistor 141 and the second resistor 142 constituting the voltage detection means 14 and input to the input (minus input terminal) of the first comparison means 15.

  Since this waveform is a half-wave rectified waveform divided by the first resistor 141 and the second resistor 142, its shape is similar to the half-wave rectified waveform, and its peak value is the peak value of the half-wave rectified waveform. Multiplied by the voltage dividing ratio of the first resistor 141 and the second resistor 142.

  When the voltage value of the commercial power supply 13 is normal, the voltage waveform input to the input (minus input terminal) of the first comparison unit 15 has the other input terminal ( Lower than the first threshold value input to the positive input terminal), the output of the first comparison means 15 becomes "H" (Hi-z), and a voltage is applied to the base of the transistor 173 of the energization prohibition means 17, The transistor 173 conducts, current flows through the second relay coil 174, the second relay contact 175 is closed, and energization of the cooking means 10 is permitted.

  At this time, since the output of the first comparison means 15 is “H”, a reverse voltage is applied to the second diode 181, so that no current flows through the second diode 181, and the third resistor 161 The first threshold value determined by the divided voltage value of the fourth resistor 162 connected in series is not affected.

  On the other hand, when the voltage value of the commercial power supply 13 rises abnormally, the voltage value of the half-wave rectified waveform rises, and the peak value of the voltage waveform input to the input (minus input terminal) of the first comparison means 15 is The output of the first comparison means 15 becomes “L” because it is higher than the first threshold value input to the other input terminal (plus input terminal) of the first comparison means 15.

  Then, the base voltage of the transistor 173 of the energization prohibiting means 17 becomes almost 0 V, the transistor 173 is turned off, no current flows through the second relay coil 174, the second relay contact 175 is opened, and the cooking means 10 is opened. Is not allowed to be energized.

  At this time, once the output of the first comparing means 15 becomes “L”, the divided voltage of the third resistor 161 and the fourth resistor 162 which are the voltages on the anode side of the second diode 181 is Since the voltage on the cathode side of the second diode 181 is lowered, a forward voltage is applied to the second diode 181 and the second diode 181 becomes conductive, and the seventh diode 161 is connected to the seventh resistor 161 by the connection portion of the fourth resistor 162. A current flows through the output terminal of the first comparison means 15 from which L is output through the series connection of the resistor 182 and the second diode 181.

This apparently means that the seventh resistor 182 is connected in parallel to the fourth resistor 162, and the divided voltage values of the third resistor 161 and the fourth resistor 162 are lowered. (Second threshold)
This feedback from the output of the first comparison means 15 to the input through the series connection of the seventh resistor 182 and the second diode 181 causes a hysteresis on the input of the first comparison means 15, and commercial If the voltage value of the power supply 13 does not drop by an amount corresponding to the hysteresis, the output of the first comparison means 15 cannot return to “H” (second comparison means 19).

  During that time, the energization prohibiting means 17 remains prohibited from energizing the cooking means 10, the second relay contact 175 remains open, and energization to the cooking means 10 is not resumed.

  Thereby, even when the voltage value of the commercial power supply 13 continues to slightly fluctuate in the vicinity of the first threshold value, energization prohibition due to hysteresis between the first threshold value and the second threshold value continues, and frequent energization to the cooking means 10 is performed. There is no prohibition or cancellation (chattering).

  The adding means 21 adds 1 to the counting means 22 every time the output of the first comparing means 15 changes from H → L.

  The third comparison unit 24 compares the third threshold value determined by the third threshold value setting unit 23 with the count value of the counting unit 22, and when the count value reaches the third threshold value, The notification means 25 notifies the user.

  Usually, in the case of a product for home use, the third threshold is set about 1 to 5 times. In the case where the third threshold is set to once, when the abnormal rise in the voltage of the commercial power supply 13 is detected, the notification unit 25 immediately notifies. By this notification from the notification means 25, the user can know that the voltage of the commercial power supply 13 has risen abnormally.

  In particular, in the case of cooking equipment that is cooked based on a sequence, such as a rice cooker or a bread cooker, if cooking is interrupted due to an abnormal increase in the voltage of the commercial power supply 13 during cooking, the taste may be impaired. Even in this case, the user can know that the cause of the deterioration of the taste is that the voltage of the commercial power supply is abnormally increased during cooking and energization of the cooking means is prohibited.

  If an appropriate third threshold value is set in the third threshold value setting means 23, noise entering from the commercial power supply 13 enters the voltage detection means 14, and the output of the first comparison means 15 is instantaneously set to L. Even if it is reversed, if the frequency is low, the counting result of the counting means 22 does not reach the third threshold value, and the notifying means 25 does not notify.

  As described above, in the present embodiment, when the voltage value of the commercial power supply 13 rises abnormally, the second relay contact 175 constituting the energization prohibiting means 17 is opened and energization to the cooking means 10 is prohibited. Thus, it is possible to prevent abnormal overheating and abnormal rotation that occur due to an abnormal rise in the voltage of the commercial power supply 13.

  In the present embodiment, even when the voltage value of the commercial power supply 13 continues to fluctuate in the vicinity of the first threshold value, energization prohibition due to hysteresis between the first threshold value and the second threshold value continues, and the cooking means The frequent energization prohibition to 10 and the cancellation thereof are not performed.

  In the present embodiment, the user can be informed that the voltage of the commercial power supply 13 has risen abnormally. In particular, in the case of cooking equipment that is cooked based on a sequence, such as a rice cooker or a bread cooker, if cooking is interrupted due to an abnormal increase in the voltage of the commercial power supply 13 during cooking, the taste may be impaired. Even in this case, the user can know that the cause of the deterioration in the taste is that the voltage of the commercial power supply has abnormally increased during cooking, and energization of the cooking means is prohibited.

  In the present embodiment, even if there is noise entering from the commercial power supply 13, by setting an appropriate third threshold in the third threshold setting means 23, unless noise is frequently generated, The malfunction of the notification means 25 can be eliminated.

  In the present embodiment, the first relay (first relay coil 112, first relay contact 111) constituting the energization control means 11 and the second relay (second second) constituting the energization prohibiting means 17 are configured. The relay coil 174 and the second relay contact 175) are configured separately, but may be shared.

(Embodiment 2)
FIG. 2 is a system configuration diagram in which a part of the electric cooker according to the second embodiment of the present invention is made into a block diagram. The description of the same components as those in Embodiment 1 is omitted.

  The timing means 26 changes the output of the first comparison means 15 from H to L when the detection voltage of the voltage detection means 14 exceeds the first threshold voltage determined by the first threshold setting means 16. After that, the accumulated time is counted while L.

  The third comparison unit 24 compares the third threshold value determined by the third threshold setting unit 23 with the time measurement time value of the time measurement unit 26.

  When the measured time value reaches the third threshold value, the notification unit 25 notifies the user. It is the same as in the first embodiment that the notification means 25 may be anything as long as it draws the user's attention, such as an LED or a buzzer.

  About the electric cooker comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The description of the same operation as that of Embodiment 1 is omitted.

  The time counting means 26 keeps counting the accumulated time while the output of the first comparison means 15 is L.

  The third comparison unit 24 compares the threshold value determined by the third threshold setting unit 23 with the time measurement value of the time measurement unit 26, and when the time measurement value reaches the third threshold value, The notification means 25 notifies the user.

  Usually, in the case of a product for home use, the third threshold is set to about 3 seconds. When the third threshold is set to 3 seconds, the notification means 25 notifies when an abnormal increase in the voltage of the commercial power supply 13 continues for 3 seconds. The notification from the notification means 25 allows the user to know that the voltage of the commercial power supply 13 has risen abnormally.

  In particular, in the case of cooking equipment that is cooked based on a sequence, such as a rice cooker or a bread cooker, if cooking is interrupted due to an abnormal increase in the voltage of the commercial power supply 13 during cooking, the taste may be impaired. Even in this case, the user can know that the cause of the deterioration of the taste is that the voltage of the commercial power supply is abnormally increased during cooking and energization of the cooking means is prohibited.

  If an appropriate third threshold value is set in the third threshold value setting means 23, noise entering from the commercial power supply 13 enters the voltage detection means 14, and the output of the first comparison means 15 is instantaneously set to L. Even if it is reversed, if the frequency is low, the counting result of the counting means 22 does not reach the third threshold value, and the notifying means 25 does not notify.

  As described above, in the present embodiment, when the voltage value of the commercial power supply 13 rises abnormally, the second relay contact 175 constituting the energization prohibiting means 17 is opened and energization to the cooking means 10 is prohibited. Thus, it is possible to prevent abnormal overheating and abnormal rotation that occur due to an abnormal rise in the voltage of the commercial power supply 13.

  In the present embodiment, even when the voltage value of the commercial power supply 13 continues to fluctuate in the vicinity of the first threshold value, energization prohibition due to hysteresis between the first threshold value and the second threshold value continues, and the cooking means The frequent energization prohibition to 10 and the cancellation thereof are not performed.

  In the present embodiment, the user can be informed that the voltage of the commercial power supply 13 has risen abnormally. In particular, in the case of cooking equipment that is cooked based on a sequence, such as a rice cooker or a bread cooker, if cooking is interrupted due to an abnormal increase in the voltage of the commercial power supply 13 during cooking, the taste may be impaired. Even in this case, the user can know that the cause of the deterioration in the taste is that the voltage of the commercial power supply has abnormally increased during cooking, and energization of the cooking means is prohibited.

  If an appropriate third threshold value is set in the third threshold value setting means 23, noise entering from the commercial power supply 13 enters the voltage detection means 14, and the output of the first comparison means 15 is instantaneously set to L. Even if it is reversed, if the frequency is low, the time value of the time measuring unit 26 does not reach the third threshold value, and the notification unit 25 does not perform notification.

  As described above, in the present embodiment, when the voltage value of the commercial power supply 13 rises abnormally, the second relay contact 175 constituting the energization prohibiting means 17 is opened and energization to the cooking means 10 is prohibited. Thus, it is possible to prevent abnormal overheating and abnormal rotation that occur due to an abnormal rise in the voltage of the commercial power supply 13.

  In the present embodiment, even when the voltage value of the commercial power supply 13 continues to fluctuate in the vicinity of the first threshold value, energization prohibition due to hysteresis between the first threshold value and the second threshold value continues, and the cooking means The frequent energization prohibition to 10 and the cancellation thereof are not performed.

  In the present embodiment, the user can be informed that the voltage of the commercial power supply 13 has risen abnormally. In particular, in the case of cooking equipment that is cooked based on a sequence, such as a rice cooker or a bread cooker, if cooking is interrupted due to an abnormal increase in the voltage of the commercial power supply 13 during cooking, the taste may be impaired. Even in this case, the user can know that the cause of the deterioration in the taste is that the voltage of the commercial power supply has abnormally increased during cooking, and energization of the cooking means is prohibited.

  In the present embodiment, even if there is noise entering from the commercial power supply 13, by setting an appropriate third threshold in the third threshold setting means 23, unless noise is frequently generated, The malfunction of the notification means 25 can be eliminated.

  In the present embodiment, the first relay (first relay coil 112, first relay contact 111) constituting the energization control means 11 and the second relay (second second) constituting the energization prohibiting means 17 are configured. The relay coil 174 and the second relay contact 175) are configured separately, but may be shared.

  As described above, the electric cooking device according to the present invention can stop the energization of the cooking means even when the voltage value of the commercial power supply is abnormally increased due to a lack of neutral wire, incorrect wiring, etc. It can prevent abnormal overheating and abnormal rotation, improve safety, and can notify the user of abnormal increase in the voltage value of the commercial power supply without malfunctioning. can do.

DESCRIPTION OF SYMBOLS 10 Cooking means 11 Energization control means 12 Power supply circuit 14 Voltage detection means 15 1st comparison means 16 1st threshold value setting means 17 Energization prohibition means 18 2nd threshold value setting means 19 2nd comparison means 21 Addition means 22 Counting means 23 Third threshold setting means 24 Third comparison means 25 Notification means 26 Timekeeping means

Claims (2)

A cooking unit, said energizing control means for controlling the energization of the cooking unit, a voltage sensing means for measuring the voltage of the commercial power supply, than the detection voltage value of said voltage detecting means when the normal voltage of the commercial power supply a first threshold setting means for setting a high first threshold value, a second threshold value setting means for setting a second threshold value which is set lower than the first threshold value, the detection voltage value of said voltage detecting means It said first comparing means for comparing the first threshold value, a second comparator means for comparing the sensed voltage value and the second threshold of said voltage sensing means, the voltage at the comparison in the first comparison means detection voltage value is prohibited energization of the cooking device when it becomes a more said first threshold value as well as allow the energization of the cooking unit is lower than the first threshold value detecting means, the second In the comparison means Energizing inhibiting means detecting a voltage value of the pressure sensing means permits the energization of the cooking device when it becomes less than the second threshold value, counting means, said counting each time the energization inhibiting means prohibits the energization adding means for adding 1 to the unit, and a third comparing means for comparing the third threshold value setting means for setting a third threshold value, the count value and the third threshold value of the counting means, said third comprising a notification unit count value of the counting means in the comparison means is notifying the arrival to the third threshold value, the first threshold value, the commercial by a deficiency or miswiring neutral line of the commercial power source The voltage detection means is set to be equal to or lower than the detection voltage value when the voltage of the power supply rises abnormally, and the energization prohibiting means has a relay contact connected in series to the cooking means, and the voltage detection means The detected voltage value is the first threshold value. When the voltage is low, the relay contact is closed to allow energization to the cooking means, and when the detected voltage value of the voltage detection means is equal to or higher than the first threshold, the relay contact is opened to energize the cooking means. Forbidden, once the detection voltage value of the voltage detection means becomes equal to or higher than the first threshold value and the relay contact is opened, the relay until the detection voltage value of the voltage detection means becomes equal to or lower than the second threshold value. electric cooker that is configured to remain open contacts. A cooking unit, said energizing control means for controlling the energization of the cooking unit, a voltage sensing means for measuring the voltage of the commercial power supply, than the detection voltage value of said voltage detecting means when the normal voltage of the commercial power supply a first threshold setting means for setting a high first threshold value, a second threshold value setting means for setting a second threshold value which is set lower than the first threshold value, the detection voltage value of said voltage detecting means It said first comparing means for comparing the first threshold value, a second comparator means for comparing the sensed voltage value and the second threshold of said voltage sensing means, the voltage at the comparison in the first comparison means detection voltage value is prohibited energization of the cooking device when it becomes a more said first threshold value as well as allow the energization of the cooking unit is lower than the first threshold value detecting means, the second In the comparison means Energizing inhibiting means detecting a voltage value of the pressure sensing means permits the energization of the cooking device when it becomes less than the second threshold value, the cumulative of the energization inhibiting means prohibits the energization of the cooking means a counting means for counting time, a third threshold value setting means for setting a third threshold value, the third comparison means for comparing the counted time value and the third threshold value of the clock means, the third comprising a notification means for counting the time value of the clock means in the comparison means to notify the arrival to the third threshold value, the first threshold value, the commercial by a deficiency or miswiring neutral line of the commercial power source The voltage detection means is set to be equal to or lower than the detection voltage value when the voltage of the power supply rises abnormally, and the energization prohibiting means has a relay contact connected in series to the cooking means, and the voltage detection means The detected voltage value is the first threshold value. The relay contact is closed to allow energization to the cooking means when the voltage is lower, and the relay contact is opened to energize the cooking means when the detected voltage value of the voltage detection means is equal to or higher than the first threshold value. And once the detection voltage value of the voltage detection means becomes equal to or higher than the first threshold value and the relay contact is opened, the detection voltage value of the voltage detection means becomes equal to or lower than the second threshold value. electric cooker that is configured to remain open relay contacts.

Images